Yes, Sean Penn gave David Spade a tattoo of cartoon character Calvin, from Calvin and Hobbes, on his left biceps. It was part of a "Saturday Night Live" sketch from 1995, Season 21, Episode 6. You can read the transcript here.
Just recently, Sean Penn showed off his abs while going shirtless at the beach in Hawaii. The 53-year-old actor was joined by a pal while doing some surfing. Read more at Just Jared.
Are Charlize Theron and Sean Penn a New Couple? Find out more at People Magazine.